Research reported in the Journal of Epidemiology and Community Health determined that individuals with asthma living in areas of the San Joaquin Valley (SJV) with high ozone and particulate pollution levels are more likely to have frequent asthma symptoms and asthma-related emergency department visits and hospitalizations. The SJV ranks among the worst in the United States in terms of air quality. Its urban areas are surrounded by agricultural operations creating a unique mix of pollutants. For access to the complete study, please visit: http://jech.bmj.com/content/64/2/142.abstract?sid=e3eaee20-29d8-4f2c-8cba-75580fc76c05